Added standalone benchmark for keymaster.

Test: Run benchmark
Bug: 139890773
Change-Id: I23c511b70bd27c58a188b5fc8ae690cdbb775dec
diff --git a/keymaster/4.0/vts/performance/Android.bp b/keymaster/4.0/vts/performance/Android.bp
new file mode 100644
index 0000000..9434bc9
--- /dev/null
+++ b/keymaster/4.0/vts/performance/Android.bp
@@ -0,0 +1,29 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+cc_benchmark {
+    name: "keymaster_benchmark",
+    defaults: ["VtsHalTargetTestDefaults"],
+    srcs: [
+        "Benchmark.cpp",
+    ],
+    static_libs: [
+        "android.hardware.keymaster@4.0",
+        "libkeymaster4support",
+        "libsoftkeymasterdevice",
+        "libchrome"
+    ],
+}